Parallel mechanism for looms



Aug. 15, 1944. R. w. HOOK PARALLEL MECHANISM FOR LOOMS Filed.March 13, 1944 Patented Aug. 15, 1944 PARALLEL MECHANISM FOR LooMs Ray. W.

Hook, near Union, S. C., assignor to' Monarch Mills, Union, S. 0., a corporation'of South Carolina Application March 13, 1944, Serial 4 Claims.

This invention relates to a parallel mechanism for looms and more especially to a parallel having a replaceable guide associated with the wear plug instead of rising from the upper surface of the parallel.

Heretofore parallels have usually been provided having a fiat upper surface, and rising from and integral with this flat upper surface, there has been a vertical fin adapted to loosely penetrate a slot in the shoe of the picker stick to guide the same. Due to the fact that there is much vibration in a loom and especially the fly motion, the iron or metal of which the parallel is made soon crystallizes, resulting in the vertical fin becoming broken off usually substantially smooth with the upper surface of the parallel. This has required that the parallel be entirely removed and anew parallel installed.

It is an object of this invention to provide a parallel having a wear plug associated therewith and with the upper surface of the parallel having an elongated slot cut therein. and the rear plug having a vertical fin rising therefrom and through said slot to act as a guide for the shoe of the picker stick, so that in the event of breakage of the vertical fin, only the wear plug has to be renewed as the parallel will remain unafiected by the breakage.

Some of the objects of the invention having been stated, other objects will appear as the description proceeds, when taken in connection with the accompanying drawing, in which:'

Figure 1 is a side elevation with parts broken away of a parallel for looms, and the shoe and the lower portion of the picker stick associated therewith, and taken substantially along the line I--l of Figure 3;

Figure 2 is a side elevation on an enlarged scale of the wear plug disassociated from the parallel;

Figure 3 is a top plan view of the parallel shown in Figure l, but omitting the picker stick and shoe;

Figure 4 is a top plan view of the wear plug shown in Figure 2;

Figure 5 is a bottom plan view of the wear plug shown in Figure 2.

In a loom, there projects out from each side of the frame of the loom a rocker shaft, not shown, and on each end of this rocker shaft, there is mounted a parallel member In by means of a set screw ii. This parallel has an upper flat surface, 22 on which the shoe i3 is adapted to oscillate. The front portion of the shoe has an elongated slot l5 which is adapted to be penetrated by a guide member I l. The parallel also has an opening it therein through which a picker stick H is adapted to project. The shoe is secured to the picker stick I! by means of a bolt I8 which not only penetrates the shoe and the picker stick, but also penetrates a guide member 23 which is broken away at its lower portion, but is adapted to project on one side of the parallel and serve as an additional guide to the rocking of the shoe. The shoe is also penetrated by a set screw 20 which is adapted to engage a parallel wear tongue 2| which is disposed on the front edge of the picker stick. A strap i9 is secured to the picker stick I I and extends downwardly below the lower end of the picker stick which is rounded to receive this strap l9, and the strap l9 lextends through the opening 16 in the parallel and enters a spring actuated drum, not shown, for returning the picker stick to normal position. The parallel has an elongated horizontally disposed cavity in which a parallel plug 22 is adapted to fit in a wedge-like manner, which parallel plug 22 has integral therewith the upstanding fin or guide I4. The left-hand end of the parallel plug 22 has a transverse arcuate cavity therein in which a roller 24 is mounted for rotation, the roller 24 serving to receive the thrust on the motion of the picker stick by bearing against the wear tongue 2|. This roller 24 projects slightly beyond the forked ends of the parallel plug 22 so as to act as a roller bearing for the parallel wear tongue 2 l. Immediately above the cavity in which the parallel plug 22 is mounted, there is an elongated slot 25 through which the vertical fin l4 projects.

It is thus seen that when the vertical fin I4 breaks, or becomes damaged in any way, that a new parallel plug 22 having a vertical fin M integral therewith can be inserted in position without the necessity of installing a new parallel.

In the drawing and specification, there has been set forth a preferred embodiment of the invention, and although specific terms are employed, they are used in a generic and descriptive sense only, and not for purposes of limitation, the scope of the invention being defined in the claims.

I claim:

1. In a parallel mechanism for looms, a parallel having a flat upper surface on which the shoe of a picker stick is adapted to oscillate, said shoe having a slot therein, said parallel having an opening through which the picker stick is adapted to project and having an elongated slot communicating with the opening and also having a transverse cavity disposed below the slot and of greater lateral dimensions than the slot, a parallel plug disposed in the transverse cavity and having a guide fin integral therewith and proj ecting upwardly through said slot to a substantial distance above the upper flat surface of the parallel and adapted to penetrate the slot in the picker stick shoe during oscillation of the picker stick.

2. In a loom,.the combination witha shoe having an opening thereiniof a parallel-on which said shoe rocks, said parallel having a parallel plug disposed therein and also having a slot above the parallel plug, said parallel plug having a guide tongue extending upwardly: through said slot and engaging in said opening whereby said shoe and said parallel are kept in alignment during rocking movement of said shoe.

3. In a loom, the combination with a shoe having an opening therein of a parallel on which said shoe rocks, a parallel plug removably mounted in said parallel and having a guide tongue projecting upwardly through the upper surface of the parallel and adapted to penetrate said opening, whereby said shoe and said parallel are kept in alignment during the rocking movement .of said shoe.

" 4. In a loom having a parallel" on? the upper surface of which a shoe of a picker stick is adapted to oscillate, said shoe having an opening therein and a parallel plug mounted in the parallel and .having an upwardly projecting guide fin for engaging said opening in said shoe to guide the 16 same during rocking movement of the shoe.

RAY W. HOOK. 

